Mode-locked, 1.94-μm, all-fiberized laser using WS2-based evanescent field interaction
Mode-locked, 1.94-μm, all-fiberized laser using WS2-based evanescent field interaction
复制标题
DOI：
10.1364/oe.23.019996
复制
发表时间：
2015-07-27
期刊：
影响因子：
3.8
通讯作者：
Lee, Ju Han
中科院分区：
文献类型：
--
作者：
Jung, Minwan;Lee, Junsu;Lee, Ju Han
我们展示了使用全光纤、锁模1.94微米激光器和基于WS2沉积的侧面抛光光纤的可饱和吸收装置。采用无离心液相剥离法(LPE)制备WS2颗粒。拉曼光谱、扫描电子显微镜、原子力显微镜等一系列测试结果表明，所制备的纳米粒子具有厚度大于5层的纳米结构。所制备的可饱和吸收器件采用了振荡光与WS2粒子之间的逝去场相互作用机制，在1925 nm波长下测得其调制深度接近10.9%。将这种基于WS2的可饱和吸收器件集成到Tm-Ho共掺光纤环形腔中，在1941 nm波长下获得了时间宽度约为1.3ps、重复频率为34.8 MHz的稳定锁模脉冲。实验结果证实，WS2可以作为一种有效的宽带可饱和吸收材料，适合于被动产生2微米波长的脉冲。(C)2015年美国光学学会
We demonstrate the use of an all-fiberized, mode-locked 1.94 mu m laser with a saturable absorption device based on a tungsten disulfide (WS2)-deposited side-polished fiber. The WS2 particles were prepared via liquid phase exfoliation (LPE) without centrifugation. A series of measurements including Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) revealed that the prepared particles had thick nanostructures of more than 5 layers. The prepared saturable absorption device used the evanescent field interaction mechanism between the oscillating beam and WS2 particles and its modulation depth was measured to be similar to 10.9% at a wavelength of 1925 nm. Incorporating the WS2-based saturable absorption device into a thuliumholmium co-doped fiber ring cavity, stable mode-locked pulses with a temporal width of similar to 1.3 ps at a repetition rate of 34.8 MHz were readily obtained at a wavelength of 1941 nm. The results of this experiment confirm that WS2 can be used as an effective broadband saturable absorption material that is suitable to passively generate pulses at 2 mu m wavelengths. (C) 2015 Optical Society of America